Image uploader script (#2164)

<!--
Open the PR up as a draft until you feel it is ready for a proper
review.

Do not make PR:s from your own `main` branch, as that makes it difficult
for reviewers to add their own fixes.

Add any improvements to the branch as new commits to make it easier for
reviewers to follow the progress. All commits will be squashed to a
single commit once the PR is merged into `main`.

Make sure you mention any issues that this PR closes in the description,
as well as any other related issues.

To get an auto-generated PR description you can put "copilot:summary" or
"copilot:walkthrough" anywhere.
-->

Closes #2132

### What

Adds `just upload <image>`, which uploads the image to google cloud
using `gsutil`. The resulting URL contains the content hash plus the
original file name, which ensures that it is unique.

```
$ just upload image.png
https://static.rerun.io/dd31922030a6bf7223d5e3728d8da5407f4d6b1a_image.png
```

The script itself contains instructions for how to setup `gsutil`. It's
really just a link to Google's tutorial. Eventually it will be
documented separately together with the rest of the new workflow.

### Checklist
* [x] I have read and agree to [Contributor
Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md)
* [ ] I've included a screenshot or gif (if applicable)

<!-- This line will get updated when the PR build summary job finishes.
-->
PR Build Summary: https://build.rerun.io/pr/2164

---------

Co-authored-by: Emil Ernerfeldt <[email protected]>

justfile

@@ -27,8 +27,7 @@ py-dev-env:
     set -euxo pipefail
     python3 -m venv venv
     venv/bin/pip install --upgrade pip
-    venv/bin/pip install -r rerun_py/requirements-build.txt
-    venv/bin/pip install -r rerun_py/requirements-lint.txt
+    venv/bin/pip install -r scripts/requirements-dev.txt
     echo "Do 'source venv/bin/activate' to use the virtual environment!"
 
 # Run all examples with the specified args
@@ -139,3 +138,6 @@ download-design-tokens:
 # Update the results of `insta` snapshot regression tests
 update-insta-tests:
     cargo test; cargo insta review
+
+upload *ARGS:
+    python3 "scripts/upload_image.py" {{ARGS}}

scripts/requirements-dev.txt

@@ -0,0 +1,7 @@
+# Pip packages all developers need
+
+-r ../rerun_py/requirements-build.txt
+-r ../rerun_py/requirements-doc.txt
+-r ../rerun_py/requirements-lint.txt
+
+google-cloud-storage==2.9.0 # for scripts/upload_image.py

scripts/upload_image.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+
+"""
+Upload an image to Google Cloud.
+
+Requires the following packages:
+  pip install google-cloud-storage # NOLINT
+
+Before running, you have to authenticate via the Google Cloud CLI:
+- Install it (https://cloud.google.com/storage/docs/gsutil_install)
+- Set up credentials (https://cloud.google.com/storage/docs/gsutil_install#authenticate)
+"""
+
+import argparse
+import hashlib
+import mimetypes
+import os
+
+from google.cloud import storage
+
+
+def content_hash(path: str) -> str:
+    h = hashlib.sha1()
+    b = bytearray(128 * 1024)
+    mv = memoryview(b)
+    with open(path, "rb", buffering=0) as f:
+        while n := f.readinto(mv):
+            h.update(mv[:n])
+    return h.hexdigest()
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description="Upload an image.")
+    parser.add_argument("path", type=str, help="Path to the image.")
+    args = parser.parse_args()
+
+    hash = content_hash(args.path)
+    object_name = f"{hash}_{os.path.basename(args.path)}"
+
+    gcs = storage.Client()
+    bucket = gcs.bucket("rerun-static-img")
+    destination = bucket.blob(object_name)
+    destination.content_type, destination.content_encoding = mimetypes.guess_type(args.path)
+    with open(args.path, "rb") as f:
+        destination.upload_from_file(f)
+
+    print(f"https://static.rerun.io/{object_name}")
+
+
+if __name__ == "__main__":
+    main()